non homologous end joining. homologous recombination non homologous end joining

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Non Homologous End Joining

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Page 1: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

Non Homologous End Joining

Page 2: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining
Page 3: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

Homologous Recombination

Non Homologous End Joining

Page 4: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining
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Differences between HR and NHEJ:

• Error- free / Error- prone• Cell cycle regulated • Varies between species

HR NHEJ

yeast mammalsplants

Page 7: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

HR NHEJ

MHC rearrangementMeiosis

Cell-induced Double Strand Brakes

Page 8: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

V(D)J recombination

Page 9: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

NHEJ Defects

• SCID (Severe Combined Immune Deficiency).

• Cancer – genome instability: rearrangements, deletions, amplifications.

Page 10: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

Ku 70/80 heterodimer

Page 11: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

Ku has a role in telomeres

?

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KU 70/80

Page 13: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

Ku is critical for telomere maintenance

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Ku Plays Several Roles at Telomeres

Telomere addition

Telomeric silencing

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Ku is a multifunctional protein

Page 16: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining

HR

NHEJ